Display and log shows disk spindown but this is not possible

Hi,

I noticed today on the display of my readynas 314 "disks Sleeping", however this is not possible. The nas is making a backup of an other nas and this will take 50 hours+, so the disks are continues working. Your hear them working.

Because I found it strange the disks are going sleeping and downloaded the logs. In the spindownlog the display notification is confirmed:

Nov 10 22:36:20 Readynas314 noflushd[2638]: Spinning down disk 2 (/dev/sdb).
Nov 10 22:36:22 Readynas314 noflushd[2638]: Spindown of disk 2 (/dev/sdb) cancelled.
Nov 10 22:46:22 Readynas314 noflushd[2638]: Spinning down disk 2 (/dev/sdb).
Nov 10 22:46:25 Readynas314 noflushd[2638]: Spindown of disk 2 (/dev/sdb) cancelled.
Nov 10 22:56:15 Readynas314 noflushd[2638]: Spinning down disk 2 (/dev/sdb).
Nov 10 22:56:18 Readynas314 noflushd[2638]: Spindown of disk 2 (/dev/sdb) cancelled.
Nov 10 23:06:18 Readynas314 noflushd[2638]: Spinning down disk 2 (/dev/sdb).
Nov 10 23:06:20 Readynas314 noflushd[2638]: Spindown of disk 2 (/dev/sdb) cancelled.
Nov 10 23:16:20 Readynas314 noflushd[2638]: Spinning down disk 2 (/dev/sdb).
Nov 10 23:16:23 Readynas314 noflushd[2638]: Spindown of disk 2 (/dev/sdb) cancelled.
Nov 10 23:26:13 Readynas314 noflushd[2638]: Spinning down disk 1 (/dev/sda).
Nov 10 23:26:15 Readynas314 noflushd[2638]: Spindown of disk 1 (/dev/sda) cancelled.
Nov 10 23:36:15 Readynas314 noflushd[2638]: Spinning down disk 1 (/dev/sda).
Nov 10 23:36:18 Readynas314 noflushd[2638]: Spindown of disk 1 (/dev/sda) cancelled.

Why are the disk going to sleep if they must work that hard?

Btw in the 314 are 2x 10TB drives in mirror (raid 1). And the harddisk are set to go to sleep after 5 minutes inactivity.

Os:6.10.3